STIGQter: STIG Summary: Microsoft Windows 11 Security Technical Implementation Guide Version: 2 Release: 8 Benchmark Date: 01 Jul 2026:

The security event log size must be configured to a value that holds at least one week's worth of audit records.

DISA Rule

SV-253338r1186375_rule

Vulnerability Number

V-253338

Group Title

SRG-OS-000341-GPOS-00132

Rule Version

WN11-AU-000505

Severity

CAT II

CCI(s)

• CCI-001849 - Allocate audit log storage capacity to accommodate organization-defined audit record retention requirements.

Weight

10

Fix Recommendation

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Event Log Service >> Security >> "Specify the maximum log file size (KB)" to "Enabled" with a "Maximum Log Size (KB)" of a value that will contain one week of audit records or greater.

If the system is configured to send audit records directly to an audit server, this must be documented with the ISSO.

Check Contents

If the system is configured to send audit records directly to an audit server, this requirement is not applicable. This must be documented with the information system security officer (ISSO).

The registry configuration setting below must be set (at least) to a value equal to the size needed to contain one week's worth of audit records in the security event log. The value used below is an example that assumes a typical week’s log size of 5GB.

If the following registry value does not exist or is not configured as specified, this is a finding:

NOTE: The following registry entry is an example; the value must equal at least one week's worth of records.

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\Windows\EventLog\Security\

Value Name: MaxSize

Value Type: REG_DWORD
Value:0x49960800 (5120000) (or greater)

Vulnerability Number

V-253338

Documentable

False

Rule Version

WN11-AU-000505

Severity Override Guidance

If the system is configured to send audit records directly to an audit server, this requirement is not applicable. This must be documented with the information system security officer (ISSO).

The registry configuration setting below must be set (at least) to a value equal to the size needed to contain one week's worth of audit records in the security event log. The value used below is an example that assumes a typical week’s log size of 5GB.

If the following registry value does not exist or is not configured as specified, this is a finding:

NOTE: The following registry entry is an example; the value must equal at least one week's worth of records.

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\Windows\EventLog\Security\

Value Name: MaxSize

Value Type: REG_DWORD
Value:0x49960800 (5120000) (or greater)

Check Content Reference

M

Target Key

5471